User's Manual

97
Diagnostic Memory Functions (Statistics)
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Description of
Displays
The contents of the diagnostic memory are displayed as a combined
text/graphical image, with the following display options:
— Event counters
— Histograms
— Trends
Event counters are displayed as bar charts showing the event totals
expressed as a percentage.
Histograms count the frequency of events in different time or rate
intervals (e. g., how many events have occurred in the 160-169 ppm
range).
Trends represent a certain number of events at a fixed point in time
(e.g., rates). The trends are plotted as points that are joined together
by a curve. For instance, if two curves are displayed in a diagram for
dual-chamber pacemakers, the thicker line always represents the
ventricular trend, and the thinner line is always the atrial trend.
Note: Applying a magnet interrupts diagnostic data
recording, regardless of the programmed magnet
effect.
Interrogating and/or Starting Statistics
The recorded diagnostic data (the saved data contents of the
pacemaker) are always read out (meaning they are transmitted during
interrogation) at the beginning of a follow-up treatment, and saved in
the programmer. This allows you to call up the relevant data via the
programmer at any time. After which, when recording of the same
statistical data is started up once again, any pre-existing statistics are
deleted from the pacemaker memory. Therefore, the user is prompted
for confirmation before a new statistics function can be started. This
safeguard prevents you from inadvertently overwriting statistics data if
you are starting the same statistics function again and again. For more
detailed information on saving statistics data and the transmission of
pacemaker data to the Cardiac Data Manager 3000, please consult the
technical manual of the software.